Integrated prevention and control of apple rot disease Apple tree rot disease is a fruit tree disease with a wide range of occurrence, a heavy degree of damage, and a great loss. Fruit trees that grow into the fruit period and fruit trees with weak slopes on the hillside are the most vulnerable to disease. In light cases, large branches and branchlets die, resulting in a drastic reduction in the ability to produce, a decline in the quality of fruit, and a shortened period of results; in others, the trunk of the main branch dies and even the entire garden is destroyed. Therefore, comprehensive measures must be taken. The following aspects should be mainly dealt with: Reasonable pruning, thinning and fruit thinning. Scientific pruning technology is used to form a reasonable plant type and promote the robust growth of fruit trees. At the same time, the technique of sparse flowering and fruit thinning should be adopted to prevent fruit trees from becoming “small and large†and to reduce the disease resistance of the tree. Strengthen the control of other diseases and pests of fruit trees. Such as apple cotton maggots, through-wing moth, Tianni and so on. Reduce the nutrient consumption of fruit trees and plug the invading portal of rot disease. Scratch treatment spot, smear agent. In the middle or late June or late October, the old cortex on the main stem or main branch of the fruit tree was scraped until the green and white live skin layer. The ulcer tissue in the shallow part of the cortex was scraped off and smeared with 50 times of methadone disinfectant. Scrape the surface. Dormant eradication prevention. It is to spray the fruit tree with 4-5 degrees lime sulfur before germination to control most of the diseases of fruit trees; or to use 100 times 40% Fumei arsenic spray, focusing on spraying large branches, main branches and main trunks of eggs, spray the medicine. Must be completed before the flowering of the fruit trees to prevent fruit trees spit green after the occurrence of phytotoxicity, and increase the application of phosphorus and potassium fertilizers to ensure the robust growth of fruit trees.
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